My Russian Mother’s orange or lemon-infused vodka made for Easter celebrations was simple: remove a quarter cup of vodka out of a liter bottle (and do whatever you want with it!) and slip in an entire thinly sliced lemon or orange peel (with minimal pith) into the bottle. After about a month, you have a gorgeous, delicious liter of citrus-infused vodka; place the bottle in the freezer. (For a real kick, substitute the peel with 1-2 tsp of red pepper flakes. Wow!)